Access Mode - Lenovo Flex System Fabric CN4093 Application Manual

802.1Q Trunk Mode

Access Mode

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CN4093 Application Guide for N/OS 8.2
Figure 37. Packet pass‐through in Tunnel Mode
Server
OS/Hypervisor
Regular
NIC attaches UFP
VLAN ID
Channel VLAN ID
Outbound
Packet
Outer tag sets vNIC;
NIC strips outer tag
Inbound
Packet
In trunk mode, a vPort can carry packets that have inner tags that belong to up to
1024 VLANs. When UFP is enabled, the following 5 VLANs are reserved for UFP
operation: 1, 4002‐4005. Therefore, up to 4089 VLANs can be configured for the
vPorts. Each VLAN in the inner tag requires a VLAN translation entry.
Note: Two vPorts operating in trunk mode on the same physical port cannot carry
the same set of VLANs in the inner tag.
Figure 38. Packet passing through in Trunk Mode
Server
OS/Hypervisor
Regular
NIC attaches UFP
VLAN IDs
Channel VLAN ID
Outbound
Packet
In access mode, a vPort carries packets with inner tags that belong to one VLAN.
The vPort is associated with the VLAN defined by the command:
CN4093(config_ufp_vport)# network default­vlan <2‐4094>
Note: VLANs 4002-4005 are reserved for outer tagging.
vNICs vPorts
NIC
Switching uses outer tag;
Ignores regular VLAN
Switching uses outer tag;
Ignores regular VLAN
vNIC vPort
NIC
VLAN
Translation
Lenovo Switch Ports without
Switch strips
outer tag
Switch adds outer
Channel VLAN ID
Lenovo Switch Ports without
VLAN
Switch strips
Classification
outer tag
vNICs
vNICs